Stair tread plate



FIG. 1 is a perspective view of a stair tread plate.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a front elevation view thereof, the rear being identical thereto.

FIG. 5 is a right side elevation view thereof, the left side being identical thereto.

FIG. 6 is a perspective view of a second embodiment of a stair tread plate.

FIG. 7 is a top plan view thereof.

FIG. 8 is a bottom plan view thereof.

FIG. 9 is a front elevation view thereof, the rear being identical thereto.

FIG. 10 is a right side elevation view thereof; the left side being identical thereto.

FIG. 11 is a perspective view of a third embodiment of a stair tread plate.

FIG. 12 is a top plan view thereof.

FIG. 13 is a bottom plan view thereof.

FIG. 14 is a front elevation view thereof, the rear being identical thereto; and,

FIG. 15 is a right side elevation view thereof, the left side being identical thereto.

The claimed design is broken in the center to indicate indefinite length.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a stair tread plate, as shown and described. 